Malicious PDF — malware analysis report

Static analysis result for SHA-256 acad5f39d9f4ee6d…

MALICIOUS

PDF

73.7 KB Created: 2021-05-20 22:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 35962cf4ef50a8e10cb09a5b77ab97d3 SHA-1: 1130c18dd0f165345a1cada94634d9ab78ba305f SHA-256: acad5f39d9f4ee6d717c4b173f618aebb2488a6285dc5ee62564fc0a3b831399
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain 'ponafet.ru'. This URL is presented in a context that suggests a phishing or malicious redirection attempt, disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/strik?utm_term=como+hacer+algoritmos+pseudocodigo PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479222/normal_5fe057475d235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_601327edf1a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488574/normal_600a0cb377cfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457561/normal_5ff67e8b8fb49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473375/normal_601cfbf22e08e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_602c69846a886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_601ffcac61729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_5fe6099e32a66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5fe823eb74784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/what_mixes_well_with_crown_royal_regal_apple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911c3071-dd27-44d2-a7cd-305cd5232c68/how_to_connect_hp_2545_printer_to_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/duzakedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd67a2d-345e-4d72-95c3-ac6e607d6a13/sharper_image_wireless_earbuds_pairing.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/suzajijefutegenafedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff03e24-548b-4de2-b5de-4510480e03e1/gemakex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1482ac05-e577-48c0-9762-0c7c47a16311/how_to_train_your_dragon_book_set_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8b85a9-5d77-420b-8232-59d5b04d3919/votefugazasoxagekososono.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/tujodokixageke.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/76973242794.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/lavulufazusopejarod.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/thermal_decomposition_of_sodium_bicarbonate_lab_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a699e4-6f9d-47c6-adb7-4e52f85300f4/senirufuwamal.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/yiruma_love_me_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/pioneer_avh-200ex_wont_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/xolagavu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A5 5392 bytes
SHA-256: 1bf3c0c12be7daeabdeb9cfa8751845191a5d35932a8de0567aad51f4f9c347f
font_01_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 11196 bytes
SHA-256: 78f2a0389f832913055deaba8958ee3c7399fcc8539ff0378e3075a43694edf2

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